RE: Inputs for comparison wanted.
eldeguello,
I agree that the shooter has as much or more to do with effective range than the gun or bow, I know several bow hunters who have and do take game at 75, 85 even 100 to 115 yards but I wouldn't suggest that to anyone who doesn't practice a lot.. That is why I limited my comparisons to the gun and load related factors of 6" point blank range and the ranges at which the load dropped to 1000 and 700 foot pounds of energy. I felt these gave as close to an apples to apples point of reference in doing the comparisons.
When the BP Express is left out the longest accurate 6" PBR load I've looked at is a 130gr pyro pellet load with a 250SW at 2100fps that came in at 194 yards. This was followed closely by the same load under a 1950fps 300SW at 186 yards. The BP Express PBR was only 234 yards even though I ran the numbers at 2500fps. The 30-30 load by comparison has a 6" PBR of 214 yards with a 150gr bullet at 2390fps. Most loads, as you stated, have a 6" PBR of between 125 and 175 yards whether they are PRB or conical or sabot.